Slip these inside your gloves to enjoy up to 12 hours of warmth. Open the outer envelope to expose the contents to air, and it produce heat without fumes or flames. A brilliant additions to an ice climbing setup or any stop-and-go winter activity.

Sold in pairs.

Each lasts up to 12 hours.

Pause the oxidization process by placing them in an airtight container. Use any remaining heat within a few days.